I'm using Isapi Re-write 3 (full version) and want to know what code to install the htaccess for the following permalink structure:http://www.domain.com/blog/%postname%-%post_id%/(notice the hyphen and not a / between postname and id)ex. http://www.domain.com/blog/deep-sea-fishing-1175/

Regarding your idea to convert /blog/%year%/%monthnum%/%postname%/ TO /%postname%-post_id%/ there's no way to get PostID form a URL that doesn't have it. You may simply leave the old set of rules for those links to make them work for users coming from other sites.